bolt manufacturer head marking

[mtull]

Does anyone know who the original manufacture was that produced bolts with head markings ELH (1st attached pic)?  I'm hoping a name will help with my search.  I shamelessly downloaded image from @Jay Bee post in the Parts Wanted section.   I'm trying to find two bolts for the wiper arm pivots (second pic).  I forget what the size is for the wiper pivots bolts are.  I've looked over the AMK site in the bulk section and found some that are close.  Aftermarket venders offer wiper pivot bolts but none I've seen have bolts like the second attached pic.

Thank you
M.

[pschlosser]

I guess Eaton Corp.